Anders Stevnhoved Olsen

Website: anders-s-olsen.github.io

Scientific interests

Unsupervised machine learning for investigating brain dynamics; functional neuroimaging (fMRI, EEG/MEG, PET/SPECT); dynamic functional connectivity, directional statistics, and brain structure-function modelling.

Biography

Publications (†first author)

1. AS Olsen†, A Brammer, PM Fisher, M Mørup (2026): Uncovering dynamic human brain phase coherence networks (PNAS, accepted).
2. DE McCulloch†, AS Olsen†, B Ozenne, DS Stenbæk, S Armand, MK Madsen, GM Knudsen, PM Fisher (2026): Multi-metric evaluations of acute psychedelic effects on fMRI brain entropy. (Nature Communications).
3. AS Olsen†, K Larsen, DE McCulloch, M Ganz, MK Madsen, B Ozenne, GM Knudsen, N ur Rehman, PM Fisher (2026): Psilocybin acutely reduces low-frequency BOLD power and frequency-specific connectivity (bioRxiv, in review)
4. K Larsen†, DE McCulloch, AS Olsen, F Müller, ME Liechti, S Borgwadt, F Holze, L Ley, P Vizeli, A Klaiber, AM Becker, B Ozenne, M Avram, PM Fisher (2026): Psychedelics distinctly alter brain entropy and complexity compared to psychostimulants (medRxiv).
5. AS Olsen†, ML Navarro, C Svarer, JL Hinrich, M Mørup, GM Knudsen (2026): Shift- and stretch-invariant non-negative matrix factorization with an application to brain tissue delineation in emission tomography data (ICASSP).
6. SMU Larsen†, SC Holst†, AS Olsen, B Ozenne, DB Zilstorff, K Brendstrup-Brix, P Weikop, S Pleinert, V Kiviniemi, PJ Jennum, M Nedergaard, GM Knudsen (2025): Sleep deprivation promotes cerebral vasomotion while respiration- and cardiac-driven brain pulsations escalate with sleep intensity. PLoS Biology.
7. A Milloz†, J Vogel, AS Olsen, JC Pang, O Strandberg, TE Anijärv, S Palmqvist, N Sportono, R Ossenkoppele, D Van De Ville, O Hansson, H Behjat (2025): Multiscale Quantification of hemispheric asymmetry in Cortical Maps using Geometric Eigenmodes (ISBI).
8. AS Olsen†, S Mansour L, JC Pang, A Zalesky, D Van De Ville, H Behjat (2025): On reconstruction of cortical functional maps using subject-specific geometric and connectome eigenmodes (ISBI).
9. AS Olsen†, Nielsen JD, Mørup M (2024): Coupled generator decomposition for fusion of electro- and magneto-encephalography data. EUSIPCO.
10. NB Iskov†, AS Olsen, KH Madsen, M Mørup (2024): Discovering Prominent Differences in Structural and Functional Connectomes Using a Multinomial Stochastic Block Model. Network Neuroscience.
11. AS Olsen†, E Ortvald, KH Madsen, MN Schmidt, M Mørup (2023): Angular central Gaussian and Watson mixture models for assessing dynamic functional brain connectivity during a motor task. ICASSP.
12. AS Olsen†, A Lykkebo-Valløe, B Ozenne, MK Madsen, DS Stenbæk, S Armand, M Mørup, GM Knudsen, PM Fisher (2022): Psilocybin modulation of dynamic functional connectivity is associated with plasma psilocin and subjective effects. Neuroimage.
13. AS Olsen†, RMT Høegh†, JL Hinrich, KH Madsen, M Mørup (2022): Combining electro-and magnetoencephalography data using directional archetypal analysis. Frontiers in Neuroscience.
14. KHR Jensen†, DE McCulloch†, AS Olsen†, SEP Bruzzone, SV Larsen, PM Fisher, VG Frøkjær (2022): Effects of an Oral Contraceptive on Dynamic Brain States and Network Modularity in a Serial Single-Subject Study. Frontiers in Neuroscience.

Awards

2021 - 3-year DTU Compute PhD scholarship